CN111668996A - A motor inner stator suitable for evaporative cooling - Google Patents

Abstract

The technology discloses an inner stator of a motor suitable for evaporative cooling, which includes a stator iron core, a liquid inlet end ring, a gas outlet end ring, a carbon fiber sleeve and a rotating shaft. The carbon fiber sleeve is closely attached to the outer edge of the stator iron core. The front end of the carbon fiber sleeve is sealedly connected with the outer edge of the liquid inlet end ring, the rear end of the carbon fiber sleeve is sealed with the outer edge of the gas outlet end ring, the rotating shaft is connected with the inner hole in the middle of the stator core, and the front end of the rotating shaft passes through the liquid inlet end The end ring and the rotating shaft are sealingly connected with the liquid inlet end ring. The rear end of the rotating shaft passes through the gas outlet end ring and the rotating shaft is sealed with the gas outlet end ring. The carbon fiber sleeve, the liquid inlet end ring, the gas outlet end ring and the rotating shaft The space enclosed between them is a stator cavity, the front end of the rotating shaft is a hollow structure to form a liquid inlet end, and the rear end of the rotating shaft is a hollow structure to form an air outlet end; the stator iron core is provided with a plurality of axial hollow channel grooves. The technology has the advantages of simple structure, strong versatility, low cost, high production efficiency and good heat dissipation effect.

Description

A motor inner stator suitable for evaporative cooling

technical field

The technology belongs to the field of motor cooling, and particularly relates to an inner stator of a motor suitable for evaporative cooling.

Background technique

The motor can be divided into outer stator and inner stator structure according to the position of the stator. At present, the structure adopted by most industrial motors is the outer side of the stator and the inner side of the rotor. The outer rotor and inner stator motor mentioned in this technology is different from the conventional structure, the stator is inside and the rotor is outside, which mainly deals with some unconventional electromechanical technical requirements. The losses during the use of the motor include copper loss, iron loss, stray loss, etc. Among them, the copper loss and most of the iron loss are located on the stator side. The motor structure of the inner stator causes the heat dissipation area of the motor stator to be larger than that of the outer stator structure. Small, the heat in the motor is not easy to dissipate. Once the heat in the motor accumulates, if it cannot be taken away in time and effectively, it will inevitably cause the temperature inside the motor to rise. Therefore, effective cooling plays a vital role in the safe operation, reliability and service life of the motor.

At present, the inner stator of the outer rotor motor generally adopts air cooling and water cooling. The water cooling structure generally adopts the method of punching holes in the middle of the shaft. The water-cooled heat dissipation method is much better than the air-cooled heat dissipation method, but as the power demand of the motor increases, and the effective heat dissipation area is insufficient due to the reduction of the size of the motor, the water-cooled heat dissipation gradually faces the bottleneck of efficiency.

Motor evaporative cooling technology is a new type of high-efficiency cooling technology that uses organic working fluid with high insulation and low boiling point to cool heat-generating components through phase conversion heat. Its working principle is to introduce a cooling liquid medium into the motor to absorb the heat of the heating object. The liquid medium absorbs heat and gasifies, transforms into a gaseous-liquid mixture, and then leads out of the motor and enters the condenser. In the condenser, the evaporative cooling medium transfers heat to the cooling water and condenses into liquid, and then returns to the inside of the motor for the next round of heat absorption.

The general motor evaporative cooling system adopts the overall immersion type. The overall immersion type has the technical difficulty of sealing, and the resistance of the rotor in the coolant is much larger than that of the air, which increases the power loss of the motor. However, designing the rotor and stator of the motor as separate evaporative cooling sealed cavities increases the structural complexity and the cost is relatively high. Because the contact area between the outside of the rotor of the outer rotor motor and the air is large, it is more suitable for air cooling and heat dissipation. Therefore, it is very important to provide an evaporative cooling system for the stator of an outer rotor motor.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present technology is to provide a motor inner stator suitable for evaporative cooling in view of the above-mentioned shortcomings of the prior art. The motor inner stator suitable for evaporative cooling has the advantages of simple structure, strong versatility, low cost and high production efficiency. , The advantages of good heat dissipation effect.

In order to realize the above-mentioned technical purpose, the technical scheme adopted by this technology is:

An inner stator of a motor suitable for evaporative cooling, comprising a stator iron core, a liquid inlet end ring, an air outlet end ring, a carbon fiber sleeve and a rotating shaft, the carbon fiber sleeve and the outer edge of the stator iron core are closely fitted , the front end of the carbon fiber sleeve is sealed with the outer edge of the liquid inlet end ring, the rear end of the carbon fiber sleeve is sealed with the outer edge of the gas outlet end ring, the rotating shaft and the inner hole in the middle of the stator core connection, the front end of the rotating shaft passes through the liquid inlet end ring and the rotating shaft is sealed with the liquid inlet end ring, the rear end of the rotating shaft passes through the gas outlet end ring and the rotating shaft is sealed with the gas outlet end ring, the carbon fiber The space enclosed between the sleeve, the liquid inlet end ring, the gas outlet end ring and the rotating shaft is the stator cavity, the front end of the rotating shaft is a hollow structure to form the liquid inlet end, and the rear end of the rotating shaft is a hollow structure so as to A gas outlet is formed, a plurality of openings are provided on the rotating shaft in the stator cavity near the liquid inlet end ring, and the openings are communicated with the liquid inlet, and a guide is provided on the rotating shaft in the stator cavity near the gas outlet end ring. an air channel and the air guide channel is communicated with the air outlet, the air guide channel extends vertically upward; the stator iron core is provided with a plurality of axial hollow channel grooves, and each axial hollow channel groove is connected to the stator cavity Connected.

As a solution for further improvement of the present technology, the carbon fiber sleeve and the outer edge of the stator iron core are closely fitted by means of interference fit;

The front end of the carbon fiber sleeve and the outer edge of the liquid inlet end ring are closely fitted by interference fit, and the fitting surfaces of the two are provided with a sealing groove, and a sealing ring is arranged in the sealing groove;

The rear end of the carbon fiber sleeve and the outer edge of the gas outlet end ring are closely fitted by means of interference fit, and the fitting surfaces of the two are provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

As a solution for further improvement of the present technology, the rotating shaft is fixedly connected with the inner hole in the middle of the stator core by means of interference fit;

The rotating shaft and the end ring of the liquid inlet are closely attached, and a sealing groove is arranged on the abutting surface of the two, and a sealing ring is arranged in the sealing groove;

The rotating shaft is in close contact with the end ring of the gas outlet, and a sealing groove is formed on the abutting surface of the two, and a sealing ring is arranged in the sealing groove.

As a solution for further improvement of the present technology, the stator core is provided with a winding coil, the front end of the rotating shaft is provided with a lead-out port that communicates with the liquid inlet end, and the lead-out wire of the winding coil passes through the opening on the rotating shaft in sequence , the liquid inlet end and the outlet of the lead wire to lead out the stator cavity, and the lead wire of the winding coil and the outlet of the lead wire are hermetically connected.

As a solution for further improvement of the present technology, the stator core is provided with a winding coil, the rear end of the rotating shaft is provided with a lead wire port communicating with the gas outlet, and the lead wire of the winding coil passes through the opening on the rotating shaft in sequence , an air outlet and a lead-out port to lead out the stator cavity, and the lead-out line of the winding coil and the lead-out port are hermetically connected.

In order to achieve the above-mentioned technical purpose, another technical solution adopted by this technology is:

An inner stator of a motor suitable for evaporative cooling, comprising a stator iron core, a liquid inlet end ring, an air outlet end ring, a carbon fiber sleeve and a rotating shaft, the carbon fiber sleeve and the outer edge of the stator iron core are closely fitted , the lower end of the carbon fiber sleeve is sealingly connected to the outer edge of the liquid inlet end ring, the upper end of the carbon fiber sleeve is sealingly connected to the outer edge of the gas outlet end ring, and the rotating shaft is connected to the inner hole in the middle of the stator core , the lower end of the rotating shaft passes through the liquid inlet end ring and the rotating shaft is sealed with the liquid inlet end ring, the upper end of the rotating shaft passes through the gas outlet end ring and the rotating shaft is sealed with the gas outlet end ring, the carbon fiber sleeve , The enclosed space between the liquid inlet end ring, the gas outlet end ring and the rotating shaft is the stator cavity, the lower end of the rotating shaft is a hollow structure to form the liquid inlet end, and the upper end of the rotating shaft is a hollow structure to form the gas outlet end , the rotating shaft is located in the stator cavity near the liquid inlet end ring with a plurality of openings and the openings communicate with the liquid inlet end, the rotating shaft is located in the stator cavity close to the gas outlet end ring with a plurality of openings and The opening is communicated with the gas outlet, and a gap is reserved between the upper part of the stator iron core and the lower part of the gas outlet end ring, and the gap is a gaseous medium space; the stator iron core is provided with a plurality of axial hollow channel grooves , and each axial hollow channel groove communicates with the stator cavity.

As a solution for further improvement of the present technology, the carbon fiber sleeve and the outer edge of the stator iron core are closely fitted by means of interference fit;

The lower end of the carbon fiber sleeve is closely fitted with the outer edge of the end ring of the liquid inlet end by means of interference fit, and the fitting surfaces of the two are provided with a sealing groove, and a sealing ring is arranged in the sealing groove;

The upper end of the carbon fiber sleeve and the outer edge of the gas outlet end ring are closely fitted by means of interference fit, and the fitting surfaces of the two are provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

As a solution for further improvement of the present technology, the rotating shaft is fixedly connected with the inner hole in the middle of the stator core by means of interference fit;

The rotating shaft and the end ring of the liquid inlet are closely attached, and a sealing groove is arranged on the abutting surface of the two, and a sealing ring is arranged in the sealing groove;

The rotating shaft is in close contact with the end ring of the gas outlet, and a sealing groove is formed on the abutting surface of the two, and a sealing ring is arranged in the sealing groove.

As a further improved solution of the present technology, the stator iron core is provided with a winding coil, the lower end of the rotating shaft is provided with a lead wire port that communicates with the liquid inlet end, and the lead wire of the winding coil passes through the opening on the rotating shaft in sequence , the liquid inlet end and the outlet of the lead wire to lead out the stator cavity, and the lead wire of the winding coil and the outlet of the lead wire are hermetically connected.

As a solution for further improvement of the present technology, the stator core is provided with a winding coil, the upper end of the rotating shaft is provided with a lead wire port communicating with the gas outlet, and the lead wire of the winding coil passes through the opening on the rotating shaft, The gas outlet and the lead-out port lead out of the stator cavity, and the lead-out wire of the winding coil and the lead-out port are hermetically connected.

The beneficial effects of this technology are:

In order to achieve better heat absorption and heat dissipation effect of evaporative cooling, the stator cavity of the stator in the motor adopts a closed structure, and the entire winding coil and stator core are completely immersed in the cooling liquid, and a gaseous medium space is reserved at the top or at the back. An air guide channel is provided at the end. According to the different placement methods of the motor, there are two types of inner stator structures: horizontal and vertical shaft designs. The main difference lies in the design of the guide channel for the vapor coolant. The overall structure is simple, the versatility is strong, the cost is low, the production efficiency is high, and the heat dissipation effect is good.

Description of drawings

FIG. 1 is a schematic structural diagram of Embodiment 1. FIG.

FIG. 2 is a schematic structural diagram of Embodiment 2. FIG.

Detailed ways

The specific embodiments of the present technology are further described below according to the accompanying drawings:

The motor evaporative cooling system includes steps and devices such as heat absorption, drainage, steam collection, condensation, liquid return, and liquid collection. This technology only discusses the stator components of the inner stator motor in the evaporative cooling system. In order to achieve better heat absorption and heat dissipation effect of evaporative cooling, the inner stator of the motor adopts a closed structure, the entire winding and the stator core are completely immersed in the cooling liquid, and a gaseous medium space is reserved at the top. According to the different placement methods of the motor, there are two inner stator structures, the horizontal arrangement in Example 1 and the vertical shaft design in Example 2. The main difference lies in the design of the guide channel for the gaseous cooling liquid.

Example 1:

As shown in Figure 1, a motor inner stator suitable for evaporative cooling includes a stator core, a liquid inlet end ring 3, a gas outlet end ring 8, a carbon fiber sleeve 5 and a rotating shaft 10, of which 2 is a bearing. The carbon fiber sleeve 5 is in close contact with the outer edge of the stator core, the front end of the carbon fiber sleeve 5 is sealedly connected with the outer edge of the liquid inlet end ring 3, and the rear end of the carbon fiber sleeve 5 is connected to the outer edge of the liquid inlet end ring 3. The outer edge of the gas outlet end ring 8 is sealedly connected, the rotating shaft 10 is connected to the inner hole in the middle of the stator core, the front end of the rotating shaft 10 passes through the liquid inlet end ring 3 and the rotating shaft 10 is sealed with the liquid inlet end ring 3 Connection, the rear end of the rotating shaft 10 passes through the gas outlet end ring 8 and the rotating shaft 10 is sealedly connected with the gas outlet end ring 8, the carbon fiber sleeve 5, the liquid inlet end ring 3, the gas outlet end ring 8 and the rotating shaft 10 The space enclosed between them is the stator cavity, the front end of the rotating shaft 10 is a hollow structure to form the liquid inlet end 1, the rear end of the rotating shaft 10 is a hollow structure to form the gas outlet end, the rotating shaft 10 is located in the stator cavity. There are a plurality of openings in the body near the liquid inlet end ring 3 and the openings communicate with the liquid inlet end 1. The rotating shaft 10 is located in the stator cavity near the gas outlet end ring 8 with an air guide channel 7 and the air guide The channel 7 communicates with the air outlet, and the air guide channel 7 extends vertically upward; the stator iron core is provided with a plurality of axial hollow channel grooves 4, and each axial hollow channel groove 4 communicates with the stator cavity.

The carbon fiber sleeve 5 is closely attached to the outer edge of the stator iron core by means of interference fit. The front end of the carbon fiber sleeve 5 is closely fitted with the outer edge of the liquid inlet end ring 3 by means of interference fit, and the fitting surfaces of the two have a sealing groove, and an O-ring is arranged in the sealing groove. The rear end of the carbon fiber sleeve 5 is tightly fitted with the outer edge of the gas outlet end ring 8 by means of interference fit, and the fitting surfaces of the two have a sealing groove, and an O-ring is arranged in the sealing groove.

The rotating shaft 10 is fixedly connected with the inner hole in the middle of the stator iron core by means of interference fit. The rotating shaft 10 is in close contact with the end ring 3 of the liquid inlet end, and a sealing groove is formed on the abutting surface of the two, and an O-shaped sealing ring is arranged in the sealing groove. The rotating shaft 10 is in close contact with the gas outlet end ring 8, and a sealing groove is formed on the abutting surface of the two, and an O-ring is arranged in the sealing groove.

The stator iron core is provided with a winding coil 6, and the front end of the rotating shaft 10 is provided with a lead wire port communicating with the liquid inlet end 1. The lead wire 11 of the winding coil 6 sequentially passes through the opening on the rotating shaft 10, the inlet The liquid end 1 and the lead-out port are thus led out of the stator cavity, and the lead-out wire 11 of the winding coil 6 is sealedly connected with the lead-out port.

The cooling medium enters the stator cavity from the liquid inlet end 1 of the rotating shaft 10, and is evenly distributed in the winding coil 6 to absorb heat, and the stator iron core and the winding coil 6 are immersed in the cooling medium. The cooling medium absorbs the heat generated by the stator winding, reaches the boiling point and then vaporizes and floats. The gaseous medium accumulates in the gaseous medium space on the upper part of the stator cavity and reaches a certain pressure, and then leads out the gas outlet 9 through the air guide channel 7 that communicates with the rotating shaft 10 .

Example 2:

As shown in FIG. 2, a motor inner stator suitable for evaporative cooling includes a stator iron core, a liquid inlet end ring 3, a gas outlet end ring 8, a carbon fiber sleeve 5 and a rotating shaft 10. The carbon fiber sleeve 5 and The outer edge of the stator core is closely attached, the lower end of the carbon fiber sleeve 5 is sealed with the outer edge of the liquid inlet end ring 3, and the upper end of the carbon fiber sleeve 5 is connected with the outer edge of the gas outlet end ring 8. Sealed connection, the rotating shaft 10 is connected with the inner hole in the middle of the stator core, the lower end of the rotating shaft 10 passes through the liquid inlet end ring 3 and the rotating shaft 10 is sealed with the liquid inlet end ring 3, and the upper end of the rotating shaft 10 Passing through the gas outlet end ring 8 and the rotating shaft 10 is sealedly connected with the gas outlet end ring 8, the enclosed space between the carbon fiber sleeve 5, the liquid inlet end ring 3, the gas outlet end ring 8 and the rotating shaft 10 is the stator cavity The lower end of the rotating shaft 10 is a hollow structure to form the liquid inlet end 1, the upper end of the rotating shaft 10 is a hollow structure to form the gas outlet end 9, and the rotating shaft 10 is located in the stator cavity close to the liquid inlet end ring 3 A plurality of openings are provided and the openings are communicated with the liquid inlet end 1. The rotating shaft 10 is located in the stator cavity and is provided with a plurality of openings near the gas outlet end ring 8, and the openings are communicated with the gas outlet end 9. The stator iron core There is a gap between the upper part of the stator core and the lower part of the gas outlet end ring 8, and the gap is the gaseous medium space 12; the stator iron core is provided with a plurality of axial hollow channel grooves 4, and each axial hollow channel groove 4 and The stator cavity is communicated.

The carbon fiber sleeve 5 is closely attached to the outer edge of the stator iron core by means of interference fit. The lower end of the carbon fiber sleeve 5 is closely fitted with the outer edge of the liquid inlet end ring 3 by means of interference fit, and a sealing groove is formed on the fitting surface of the two, and an O-ring is arranged in the sealing groove. The upper end of the carbon fiber sleeve 5 is closely fitted with the outer edge of the gas outlet end ring 8 by means of interference fit, and a sealing groove is formed on the fitting surface of the two, and an O-ring is arranged in the sealing groove.

The rotating shaft 10 is fixedly connected with the inner hole in the middle of the stator iron core by means of interference fit. The rotating shaft 10 is in close contact with the end ring 3 of the liquid inlet end, and a sealing groove is formed on the abutting surface of the two, and an O-shaped sealing ring is arranged in the sealing groove. The rotating shaft 10 is in close contact with the gas outlet end ring 8, and a sealing groove is formed on the abutting surface of the two, and an O-ring is arranged in the sealing groove.

The stator core is provided with a winding coil 6, and the lower end of the rotating shaft 10 is provided with a lead wire port that communicates with the liquid inlet end 1. The lead wire 11 of the winding coil 6 sequentially passes through the opening on the rotating shaft 10, the inlet The liquid end 1 and the lead-out port are thus led out of the stator cavity, and the lead-out wire 11 of the winding coil 6 is sealedly connected with the lead-out port.

The stator winding coils 6 in the motor of the present technology are all immersed in a stator cavity filled with an evaporative cooling medium. The stator cavity consists of a carbon fiber sleeve 5 and end rings at both ends of the stator (ie the liquid inlet end ring 3 and the gas outlet end Ring 8) is surrounded by. Liquid and gaseous media can enter and exit the sealed space of the stator from the hollow channels at both ends of the rotating shaft 10 (ie, the liquid inlet end 1 and the gas outlet end 9 ).

The liquid medium of the present technology can flow freely between the axial hollow channel groove 4 of the stator core and the end cavity. The stator winding and iron core of the motor transfer heat to the cooling medium, and the cooling medium absorbs heat and vaporizes. Since the density of the gaseous medium is much lower than that of the liquid state, the vaporized medium floats up in the stator cavity and enters the upper reserved gaseous medium space 12 , which is led out to the condenser through the outlet end 9 of the rotating shaft 10 . The lead wire 11 of the stator winding can be optionally guided to the liquid inlet end 1 or the gas outlet end 9 of the rotating shaft 10. At the same time, the rotating shaft 10 has an inlet and outlet for cooling medium and a lead wire port. Prevent cooling medium leakage. This paper demonstrates the design of the lead wire 11 leading out the motor stator from the liquid inlet end 1.

The carbon fiber sleeve 5 has a series of advantages such as high strength, friction resistance, high temperature resistance, corrosion resistance, and convenient processing. O-rings further improve pressure tightness. The carbon fiber sleeve 5 is closely attached to the outer edge of the stator iron core, and its thickness is smaller than the air between the magnetic steel and the outer diameter of the iron core, which can effectively cut off the friction loss between the stator iron core and the air. Further prolong the service life of the motor.

The rotating shaft 10 of the motor is processed into two hollow ends, which are the liquid inlet end 1 and the gas outlet end 9 respectively. The rotating shaft 10 and the stator iron core are fixed by interference fit. The rotating shaft 10 is closely fitted with the liquid inlet end ring 3 and the gas outlet end ring 8, and the fitting surface is also designed with a sealing ring groove and a sealing ring to further achieve the sealing of the stator cavity.

The cooling medium enters the stator cavity from the liquid inlet end 1 of the rotating shaft 10, and is evenly distributed in the winding coil 6 to absorb heat, and the stator iron core and the coil are immersed in the cooling medium. A gaseous medium space 12 is left in the upper part of the stator cavity. The cooling medium absorbs the heat generated by the stator winding, reaches the boiling point, and then vaporizes and floats. The vaporized medium floats in the stator cavity and enters the upper reserved gaseous medium space 12. The outlet end 9 of the rotating shaft 10 is led out.

The above descriptions are only preferred embodiments of the present technology, and do not limit the present technology in any form. The tasks are familiar to those skilled in the art, without departing from the scope of the technical solution, can use the above-mentioned technical content to make many possible changes and modifications to the technical solution, or modify the equivalent embodiments of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments according to the present technology without departing from the content of the technical solution belong to the protection scope of the technical solution.

Claims (10)

1. An electric machine inner stator suitable for evaporative cooling, its characterized in that: the stator comprises a stator core, a liquid inlet end ring, a gas outlet end ring, a carbon fiber sleeve and a rotating shaft, wherein the carbon fiber sleeve is tightly attached to the outer edge of the stator core, the front end of the carbon fiber sleeve is hermetically connected with the outer edge of the liquid inlet end ring, the rear end of the carbon fiber sleeve is hermetically connected with the outer edge of the gas outlet end ring, the rotating shaft is connected with an inner hole in the middle of the stator core, the front end of the rotating shaft penetrates through the liquid inlet end ring and the rotating shaft is hermetically connected with the liquid inlet end ring, the rear end of the rotating shaft penetrates through the gas outlet end ring and the rotating shaft is hermetically connected with the gas outlet end ring, a space enclosed by the carbon fiber sleeve, the liquid inlet end ring, the gas outlet end ring and the rotating shaft is a stator cavity, the front end of the rotating shaft is of a hollow structure to form a liquid inlet end, the rear end of the rotating shaft is of a hollow structure to form a gas outlet end, a plurality of, an air guide channel is arranged on the rotating shaft and positioned in the stator cavity and close to an end ring of the air outlet end, the air guide channel is communicated with the air outlet end, and the air guide channel extends vertically upwards; a plurality of axial hollow channel grooves are formed in the stator core, and are communicated with the stator cavity.

2. An electric machine inner stator suitable for evaporative cooling as set forth in claim 1, wherein: the carbon fiber sleeve is tightly attached to the outer edge of the stator core in an interference fit manner;

the front end of the carbon fiber sleeve is tightly attached to the outer edge of the liquid inlet end ring in an interference fit mode, a sealing groove is formed in the attachment surface of the carbon fiber sleeve and the outer edge of the liquid inlet end ring, and a sealing ring is arranged in the sealing groove;

the rear end of the carbon fiber sleeve is tightly attached to the outer edge of the air outlet end ring in an interference fit mode, the attachment surfaces of the rear end of the carbon fiber sleeve and the outer edge of the air outlet end ring are provided with sealing grooves, and sealing rings are arranged in the sealing grooves.

3. An electric machine inner stator suitable for evaporative cooling as set forth in claim 2, wherein: the rotating shaft is fixedly connected with an inner hole in the middle of the stator core in an interference fit mode;

the rotating shaft is tightly attached to the liquid inlet end ring, a sealing groove is formed in the attachment surface of the rotating shaft and the liquid inlet end ring, and a sealing ring is arranged in the sealing groove;

the rotating shaft is tightly attached to the air outlet end ring, the attachment surface of the rotating shaft and the air outlet end ring is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

4. An electric machine inner stator suitable for evaporative cooling as set forth in claim 3, wherein: be equipped with the winding coil on the stator core, the front end of pivot is equipped with the outlet of leading out with the feed liquor end intercommunication, thereby the stator cavity is derived to the outlet of winding coil through pivot opening, feed liquor end and outlet in proper order, sealing connection between the outlet of winding coil and the outlet of leading out.

5. An electric machine inner stator suitable for evaporative cooling as set forth in claim 3, wherein: the stator core is provided with a winding coil, the rear end of the rotating shaft is provided with an outgoing line port communicated with the outgoing line port, the outgoing line of the winding coil sequentially penetrates through the opening in the rotating shaft, the outgoing line port and the outgoing line port to lead out the stator cavity, and the outgoing line of the winding coil is connected with the outgoing line port in a sealing mode.

6. An electric machine inner stator suitable for evaporative cooling, its characterized in that: the stator comprises a stator core, a liquid inlet end ring, a gas outlet end ring, a carbon fiber sleeve and a rotating shaft, wherein the carbon fiber sleeve is tightly attached to the outer edge of the stator core, the lower end of the carbon fiber sleeve is hermetically connected with the outer edge of the liquid inlet end ring, the upper end of the carbon fiber sleeve is hermetically connected with the outer edge of the gas outlet end ring, the rotating shaft is connected with an inner hole in the middle of the stator core, the lower end of the rotating shaft penetrates through the liquid inlet end ring and is hermetically connected with the liquid inlet end ring, the upper end of the rotating shaft penetrates through the gas outlet end ring and is hermetically connected with the gas outlet end ring, a space enclosed by the carbon fiber sleeve, the liquid inlet end ring, the gas outlet end ring and the rotating shaft is a stator cavity, the lower end of the rotating shaft is of a hollow structure to form a liquid inlet end, the upper end of the rotating shaft is of a hollow structure to form a gas outlet end, a plurality of, a plurality of openings are arranged on the rotating shaft and positioned in the stator cavity and close to the air outlet end ring, the openings are communicated with the air outlet end, a gap is reserved between the upper part of the stator core and the lower part of the air outlet end ring, and the gap is a gaseous medium space; a plurality of axial hollow channel grooves are formed in the stator core, and each axial hollow channel groove is communicated with the stator cavity.

7. An electric machine inner stator suitable for evaporative cooling as set forth in claim 6, wherein: the carbon fiber sleeve is tightly attached to the outer edge of the stator core in an interference fit manner;

the lower end of the carbon fiber sleeve is tightly attached to the outer edge of the liquid inlet end ring in an interference fit mode, a sealing groove is formed in the attachment surface of the carbon fiber sleeve and the outer edge of the liquid inlet end ring, and a sealing ring is arranged in the sealing groove;

the upper end of the carbon fiber sleeve is tightly attached to the outer edge of the air outlet end ring in an interference fit mode, the attachment surfaces of the upper end and the outer edge of the air outlet end ring are provided with sealing grooves, and sealing rings are arranged in the sealing grooves.

8. An electric machine inner stator suitable for evaporative cooling as set forth in claim 7, wherein: the rotating shaft is fixedly connected with an inner hole in the middle of the stator core in an interference fit mode;

the rotating shaft is tightly attached to the liquid inlet end ring, a sealing groove is formed in the attachment surface of the rotating shaft and the liquid inlet end ring, and a sealing ring is arranged in the sealing groove;

the rotating shaft is tightly attached to the air outlet end ring, the attachment surface of the rotating shaft and the air outlet end ring is provided with a sealing groove, and a sealing ring is arranged in the sealing groove.

9. An electric machine inner stator suitable for evaporative cooling as set forth in claim 8, wherein: be equipped with the winding coil on the stator core, the lower extreme of pivot is equipped with the outlet of leading out with the feed liquor end intercommunication, thereby the stator cavity is derived to the outlet of winding coil through epaxial opening, feed liquor end and outlet of leading out in proper order, sealing connection between the outlet of winding coil and the outlet of leading out.

10. An electric machine inner stator suitable for evaporative cooling as set forth in claim 8, wherein: the stator core is provided with a winding coil, the upper end of the rotating shaft is provided with an outgoing line port communicated with the air outlet end, the outgoing line of the winding coil sequentially penetrates through the opening in the rotating shaft, the air outlet end and the outgoing line port to lead out the stator cavity, and the outgoing line of the winding coil is connected with the outgoing line port in a sealing mode.

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